Compare the plug shapes, voltage and frequency in Thailand and Saint Lucia, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Thailand, you will need a travel adapter for Saint Lucia. Thailand uses Type A/Type B/Type C/Type O plugs, and Saint Lucia uses Type G, so the pin shapes will not fit any wall socket.
Thailand (home)
Saint Lucia (destination)
Electrical specifications in Saint Lucia
Voltage
Frequency
More about plugs in Saint Lucia
In Saint Lucia, the standard power plug is Type G. The country runs on 230 volts at 50 Hz. That means every wall socket in Saint Lucia is the same shape — Type G, and your plug needs to physically match the socket to fit.
Full Saint Lucia plug guide